A standing seam roof is a metal roofing type with seams that are raised about the roofing level. It’s basically a metal panel system with concealed fasteners, vertical legs, and a flat, broad area between legs. This roof has raised seams or vertical legs that are raised above the flat area of the panels. One thing that sets a standing seam roof apart is the hidden fasteners. The panel can be attached to a roof deck with a clip. It can also be fastened directly to a decking material beneath the vertical leg with a fastener flange. Most houses with metal roofs have standing seam roofs. These are continuous metal panels that run from the roof ridge to the eaves. The seams between panels are connected by raised fasteners that are above the metal roofing level. Perhaps, the fact that the seams are raised is the reason they are called standing seams. Seams are generally the weak points of most building materials, particularly roofing. Therefore, raised seams above the water level give this roofing an edge above other types of roofs.
Major Elements of a Standing Seam RoofThere are elements that make a standing seam roof stand out. These include:
- Seam fasteners- Seam fasteners can have a height that ranges from 0.50 to 1.5 inches. However, fasteners of a standing seam roof are concealed. That’s why when you look at this roof you see just a continuous, smooth ridge that extends from the top to the bottom of the roof.
- Pre-formed or Site-formed- The roof panels can be pre-formed or even site-formed. When panels are pre-formed, it means they are made in a factory away from the installation site. Site-formed panels on the other hand are made using metal rolls through a mobile machine that is used to crimp metal to form rigid panels.
- Width and composition of panels- The width of panels range from 12 inches to 19 inches. The panels can be made of aluminum or galvalume-coated steel.
Installation of a Standing Seam RoofAs stated, the installation or formation of a standing seam roof is done by crimping the adjacent seams together and sealing them into a single join. The purpose or advantage of doing this is to create a roof drain. Installation of standing seam panels is done in sequence after placing the right underlayment. Choosing the right underlayment is very important. Self-adhering water and the ice-shielded product are particularly the best. The width of standing seam panels ranges from 18 inches to 24 inches and the panels run parallel to the roof’s slope. Fasteners or clips are used to attach panels to the underlayment. This allows the metal to contract and expand as the temperature changes. A crimping tool is used to crimp seams together. The crimping action is repeated until the panels become seamed. Standing seam metal panels have the following basic styles:
- Symmetrical mechanically seamed
- Mechanically seamed
- One-piece snap lock
- Two-piece snap lock
Advantages of a Standing Seam RoofSome of the advantages of a standing seam roof include:
- Fewer seams- The metal panels of this roof run unhindered from top to the bottom. Thus, the roof doesn’t have horizontal seams and it has fewer overall seams.
- High seams- Seams are the entry points for moisture. In this roof, seams are raised above the roofing panel thereby preventing entry of moisture.
- Durable- Standing seam roof is made of metal which is a durable and tough material. Metal is impervious to most hazards.
- Cool roof quality- Standing seam metal roof can be painted with a reflective color that prevents heat gain. This keeps the house where the roof is installed cool during summer.
- The sleek look- The straight, smooth lines of a standing seam roof gives it a sleek look. This makes it ideal for country-style or modern houses.
- Multiple color choices- Standing seam roof is available in different colors. This makes it easy to choose a roof color that compliments a building.
Disadvantages of a Standing Seam RoofSome of the disadvantages of a standing seam roof include:
- High upfront cost- Installing a standing seam metal roof costs more than installing conventional shingles. Nevertheless, the high cost of this roof can be amortized through its durability and low maintenance.
- A standing seam roof is not suitable for a flat roof.